Mold can be tough to get rid of because mold spores are always present everywhere and they grow when conditions are right. Mold needs moisture, warm temperatures, and a food source (like drywall or fabric) to grow and reproduce spores, which spread through air, water and insects.Home Mold Remediation – Mold can even be built into new homes. In this age when time is money, contractors may not wait until the house structure dries out after a rain before sealing in the walls, trapping the moisture in the walls. This may not happen often but it can happen; so even new homes should be inspected. If you walk into a brand new house and it smells musty, there’s probably a problem.